28 static void add_crc16(uint8_t * blk, int len)  in add_crc16()  argument
67 	crc = crctab[(crc >> 8) ^ *blk++] ^ crc << 8;  in add_crc16()
69     *blk++ = crc >> 8;  in add_crc16()
70     *blk = crc;  in add_crc16()
73 static void send_ack(struct ymodem_state *ym, const uint8_t *blk,
76 static void send_ack_blk(struct ymodem_state *ym, uint8_t *blk)  in send_ack_blk()  argument
80     blk[0] = STX;  in send_ack_blk()
81     blk[1] = ym->seq++;  in send_ack_blk()
82     blk[2] = ~blk[1];  in send_ack_blk()
83     add_crc16(blk+3, 1024);  in send_ack_blk()
85     send_ack(ym, blk, 1024+5);  in send_ack_blk()
88 static void send_ack(struct ymodem_state *ym, const uint8_t *blk, size_t bytes)  in send_ack()  argument
93 	serial_write(&ym->serial, blk, bytes);  in send_ack()